About Importing IGES Files in Sketcher Mode
You can import IGES files containing 2D curve geometry into Sketcher mode.
Most IGES files do not contain dimensions, or if they do, there is no associativity between the dimensions and the geometry. Therefore, you need to dimension most imported IGES files in Sketcher mode. If the associativity between dimensions and geometry is established, the Creo application attempts to use this dimensioning scheme.
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When importing an IGES file, the Creo application assumes that the IGES file contains only 2D entities in the xy-plane, and does not check for errors. Sketcher mode does not support subfigures and subfigure instances.
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